My script often doesn't save my stats. How can I fix this?

Hi, I've tried to make a save script using UpdateAsync, and it doesn't save. I've added two prints that can help me troubleshoot (print("operation start") and print("operation end")), and the script just prints, "operation start" and nothing else. The table isn't nil or empty. Any help (including tried but doesn't work) will be appericated! I've tried looking at the DevForum and asked at RoDevs Discord. I have my game "Enable Studio Access to API Services" enabled.

Here's this thing that's been bugging me. (It's inside of a huge script (where events PlayerAdded and PlayerRemoving are) and I can't copy and paste this huge thing, otherwise it will take time for you to analyze.)

function saveData(plr)
    local function updateAsync(givenDatastore, givenKey, givenValue)
        print("operation start")
        local s, e = pcall(function()
            if givenValue then
                givenDatastore:UpdateAsync(givenKey, function(rawOld)
                    local cookedOld = rawOld or starterData

                    if givenValue.dataId > cookedOld.dataId then
                        givenValue.dataId += 1
                        return givenValue
                    else
                        return cookedOld
                    end
                end)    
            end
        end)

        print("operation end")

        if s then
            print("All is fine!!")
        else
            warn(e)
        end
    end

    local savedData = {}
    local folder = plr.data

    for _, object in pairs(folder:GetChildren()) do
        if object:IsA("Folder") then
        else
            savedData[object.Name] = object.Value
        end
    end
    updateAsync(playerDatastore, plr.UserId .. "-p", savedData)
end

Here's what the output tells me:

Expectations: https://ibb.co/J21tv39 Reality: https://ibb.co/m8QFN8N